反应详情

A solution of 5-chlorosulfonyl-2-oxindole (3 g), o-anisidine (1.8 mL) and pyridine (2.1 mL) in dichloromethane (20 mL) was stirred at room temperature for overnight at which time the red color solid was present. The solid was filtered, washed with ethanol and dried under vacuum to yield 1.5 g (37%) of 2-oxo-2,3-dihydro-1H-indole-5-sulfonic acid (2-methoxy-phenyl)-amide.

1. filtrationThe solid was filtered
2. washwashed with ethanol
3. customdried under vacuum